Cyclone filter with all metal filtering candle

Abstract

A filtering apparatus for separation of solids from a solid carrying fluid arranged in a housing and having a material flow inlet. The housing is divided into an upper collector chamber and a lower area by an intermediate separating wall. One or more candle filters made up of two concentrically arranged metal fabric filter cylinders defining an annular space therebetween the arranged in a material flow area of the housing and may be surrounded by an immersion tube. A plurality of Laval nozzles are arranged above each candle filter in the collector chamber and are utilized for producing an enhanced injection reverse flushing effect to remove solids adhering to the candle filters. The annular cylindrical configuration of the candle filters greatly enhances the filtering surface area.

I claim: 
     
       1. A filtering apparatus for separation of solids from a solid carrying fluid comprising: a housing connected to means for admitting a fluid flow;   an upper collector chamber for cleansed fluid defined by an intermediate separating wall of said housing, said upper collector chamber exhibiting an outlet;   at least one candle filter mounted within said housing comprising two concentrically arranged, metal fabric filter cylinders;   an annular space between said filter cylinders;   means for closing said annular space at a lower extension of said filter cylinders;   an annular duct connected at an upper extension of said filter cylinders, leading through said intermediate separating wall and providing open communication between said annular space and said upper collector chamber;   a plurality of cleaning nozzle means for producing an injection reverse flushing effect to remove solids adhering to said filter cylinders, disposed above and directed into said annular duct; and   a plurality of wash nozzle means, disposed in an area enclosed by said candle filter and externally to said candle filters, for effecting a superficial cleaning of said filter cylinders in case of a product change in order to prevent contamination, without a need of dismantling or replacing said candle filter.   
     
     
       2. A filter apparatus according to claim 1, wherein said filter cylinders exhibit a circular cross-section.